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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include <private/chartcategoryaxisx_p.h>
#include <QtCharts/QCategoryAxis>
#include <QtCharts/QAbstractAxis>
#include <private/chartpresenter_p.h>
#include <private/abstractchartlayout_p.h>
#include <QtWidgets/QGraphicsLayout>
#include <QtCore/QtMath>
QT_BEGIN_NAMESPACE
ChartCategoryAxisX::ChartCategoryAxisX(QCategoryAxis *axis, QGraphicsItem* item)
: HorizontalAxis(axis, item, true),
m_axis(axis)
{
QObject::connect(axis, SIGNAL(categoriesChanged()), this, SLOT(handleCategoriesChanged()));
}
ChartCategoryAxisX::~ChartCategoryAxisX()
{
}
QList<qreal> ChartCategoryAxisX::calculateLayout() const
{
int tickCount = m_axis->categoriesLabels().size() + 1;
QList<qreal> points;
if (tickCount < 2)
return points;
const QRectF &gridRect = gridGeometry();
qreal range = max() - min();
if (range > 0) {
points.resize(tickCount);
qreal scale = gridRect.width() / range;
for (int i = 0; i < tickCount; ++i) {
if (i < tickCount - 1) {
qreal x = (m_axis->startValue(m_axis->categoriesLabels().at(i)) - min()) * scale + gridRect.left();
points[i] = x;
} else {
qreal x = (m_axis->endValue(m_axis->categoriesLabels().at(i - 1)) - min()) * scale + gridRect.left();
points[i] = x;
}
}
}
return points;
}
void ChartCategoryAxisX::updateGeometry()
{
setLabels(m_axis->categoriesLabels() << QString());
HorizontalAxis::updateGeometry();
}
QSizeF ChartCategoryAxisX::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
{
Q_UNUSED(constraint);
QSizeF sh;
QSizeF base = HorizontalAxis::sizeHint(which, constraint);
const QStringList ticksList = m_axis->categoriesLabels();
qreal width = 0; // Width is irrelevant for X axes with interval labels
qreal height = 0;
switch (which) {
case Qt::MinimumSize: {
if (labelsVisible()) {
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
QStringLiteral("..."),
axis()->labelsAngle());
height = boundingRect.height() + labelPadding() + base.height() + 1.0;
} else {
height = base.height() + 1.0;
}
sh = QSizeF(width, height);
break;
}
case Qt::PreferredSize: {
if (labelsVisible()) {
qreal labelHeight = 0.0;
for (const QString &s : ticksList) {
QRectF rect = ChartPresenter::textBoundingRect(axis()->labelsFont(), s, axis()->labelsAngle());
labelHeight = qMax(rect.height(), labelHeight);
}
height = labelHeight + labelPadding() + base.height() + 1.0;
} else {
height = base.height() + 1.0;
}
sh = QSizeF(width, height);
break;
}
default:
break;
}
return sh;
}
void ChartCategoryAxisX::handleCategoriesChanged()
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
QT_END_NAMESPACE
#include "moc_chartcategoryaxisx_p.cpp"
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